Door-lock.



11. TR'IANTAPILU.

DOOR LOGK.

APPLIUATION FILED APRJS, 1910.

Patented Aug. 29, 1911.Y

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NICHOLAS TRIANTAFILU, OF NEV BRITAIN, CONNECTICUT.

noon-Lock. i

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Specification of Letters Patent.

Application filed April 18, 1910.

Patented Aug. 29, 1911. serial No. 556,057.

p To all whom tt may concern:

Be it known that I, NICHOLAS TRIANTA FILU, a citizen of Greece,residing` in New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inDoor-Locks, of which the following is a specification.

My invention relates to improvements in locks and the objects of myimprovements are to produce a lock whose bolt member has an engagingnose that is always projected beyond the casing, and a suitable keepertherefor, whereby means are provided for preventing the disengaging ofthe said nose and keeper by forcing the said nose inwardly within thesaid casing.

In the accompanying drawing: Figure 1 is a front view of my lock, inpart broken out and part of a door casing showing-the bolt disengaged.Fig. 2 is a similar view of the same, the door and casing being omitted,showing the bolt engaged with the keeper. Fig. 3 is a side elevation ofthe end of my look. Fig. 1 is a face View of the keeper. Fig. 5 is asectional view on the line m of Fig. 4;.

A is a casing which comprises a housing for the bolt B of my lock andthe operating mechanism therefor to be described, and which bolt has aprojecting nose 10 and as shown serves as a housing for a door knoboperatedvlatch C of ordinary construction, the spring operated bolt ofwhich has a projecting nose 11 in the usual manner. 'Ihe said casing Ais adapted to be mortised in a door D so that the said bolt noses 10 and11 will project beyond the edge of the same, a condition which isordinary as regards the nose 11 of the door knob latch C. A keeper E hasrecesses 12 and 13 adapted respectively to engage with the noses 10 and11, the recess 13 being of ordinary construction. The said bolt B has avertically reciprocating motion and the recess 12 has an opening orpassage way 111 on the side from which the door closes which registerswith the said nose 10 at one of the limiting positions of itsreciprocatory motion so as to permit the free movement of the said nose10 therein back and forth, and accordingly permitting the free openingand closing of the door. IVith the nose 10 received in the said recess12 and dropped as shown to the other limiting posit-ion of reciprocationthe said nose 10 is restrained by the lateral walls of the said recess12 and the door is thereby locked. The said bolt B is an L shapedmember, the general body 15 of which comprises an upwardly directed arm,the upper end 16 of which is a tit for and reciprocates in a hole in thetop 17 of the casing A and at its lower end has a laterally directed arm18 projecting through a slot 19 in the side wall 2O of the casing andhas at its outer end the said nose 10. A lateral recess 21 in the saidbolt B, asshown near the upper end of the same, is provided and isadapted to engage with the auxiliary bolt F of an auxiliary lockingmechanism or lock G operated by a key H and hold the bolt B in theengaged or locked position.

A spring I engaging with a notch 22 in the bolt B tends to force thebolt B upward to the free or disengaged or unlocked posi tion. Knobs J Jone on the front side and the other on the back are mounted on the saidbolt B and serve as means for forcing the bolt B downward to the lockingor engaging position in opposition to the spring I so that by turningthe key I-I the auxiliary bolt F may engage the said recess 21 and holdthe said bolt B in such engaged position. The said knobs J, J are oifsetrelatively to one another so that the securing rivet or pin M may ineach case pass entirely through the said bolt B without interference onewith the other. Guides and lugs may be provided for guiding the lowerend of the said bolt B. I prefer however to utilize the said spring Ifor this purpose. This I am enabled to do by making the said spring ofthe double arm or V type of rigid or stiff spring material having twoarms 23 which may be essentially equal and straight and shaped at theapex 24 to form an eye suitable for mounting on a pin K. The lower arm23 engages with a back pressure pin L and the upper arm 23 engages witha notch 22 and in essentially perpendicular alinement with the directionof reciprocation of the said bolt B and is adapted to act as a strut,operating against the pin 24 to restrain and limit the backward orinward movement of the lower end of t-he bolt B and the nose 10.

A Ward block N having grooves 25 fitting corresponding projections onthe key H controis the use of a suitable key for operating the auxiliarylock G. In general the said auxiliary lock G is ordinary and any form ofapproved and reliable lock may be employed in the place of the same.

The back 26 of the ho'using A and the cover P for the same are providedWith a suitable key hole 27 for the key H and slot 2S for the shank ofthe knob J, and means for mounting the door knob 29 of the door knobmechanism C.

My door look as described is particularly free from danger of beingmaliciously opened and is especially safe and reliable.

I claim as my invention:

l. In a door lock comprising a bolt having an elongatedbody providedwith a` nose at right angles to the said body and having a limitedlongitudinal motion bodily in one plane and in the direction of the saidelongated body, and a keeper having means for engagement anddisengagement With the said nose at the respective extremes of saidmotion, a spring tending to hold said nose in the disengaged position,means for forcing the said 'nose to the engaged position and means forholding the said nose in such engaged position.

2. In a door lock, a bolt having a body provided With a laterallydirected nose at right angles to the said body, and having a limitedreciprocal motion and constantly in one plane, the said nose projectingconstantly beyond the body of the lock by a deiinite and fixed amount, aspring tending to force the said nose in one direction and in positionfor disengagement with the said keeper, means for forcing the said noseinto position of engagement With the said keeper, and in opposition tothe said spring, and an auxiliary bolt and operating mechanism thereforsuitable foi-locking the said nose in such engaged position.

NICHOLAS TRIANTAFILU.

lVitnesses ELLIS JAMES, SHEFFIELD H. CLARKE.

Copies of this patent may be obtained-for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

